高溫高壓硬密封球閥

1、高溫高壓硬密封球閥High pressure hard sealing ball valveBrief introduction:Ball valves and plug valves belong to one type of valve,Only its closing piece is a sphere,The ball revolves around the center of the valve bodyA valve that opens and closes.High pressure hard sealing ball valveIs evolved from the cock

2、, its opening and closing parts as a sphere, using the ball around the axis of the stem rotationturnNinetyDegree to achieve the purpose of opening and closing. High pressure hard sealGlobe valveMainly used for cutting, distributing, and changing media on a pipeFlow direction, designed toVShaped open

3、ing of the ball valve also has good flow regulation function.High pressure hard sealing ball valveThe structure is simple,Good sealing performance,And in a certain nominal range, the volume is smaller,weightLight and material consumption is small, installation size is small, and driving torque is sm

4、all, easy to operate, easy to realize rapid opening and closing, it is more than ten yearsTo develop one of the fastest varieties of valves. Especially in the United States, Japan, Germany, France, Italy, the west, Britain and other industrial developed countries, the ball valveThe use of the produc

5、t is very extensive, and the varieties and quantities used are still expandinghigh temperature,high pressure,Big mouthHigh sealing and longLife、Excellent regulation performance and multifunction development of one valve,Its reliability and other performance indicators have reached a high level,It ha

6、s been partly replaced by gate valve, stop valve and throttle valve. With the technical progress of the ball valve, within the foreseeable short-term, especiallyIts on the oil and gas pipeline,There will be a wider range of applications in oil cracking units as well as in the nuclear industry.Beside

7、s,In other worksIndustry in large and medium-sized caliber, low pressure field, ball valve will also become one of the leading types of valves.The principle of the ball valve is to rotate the valve stem to make the valve unblocked or blocked.Globe valveEasy switch,Small volume,It can be made very bi

8、gCaliber, sealed, reliable, structureSimple, easy maintenance, sealing surface and spherical surface often in closed state, it is not easy to be medium erosion,It has been widely used in various industries.The ball valve is mainly used for cutting in the pipeline,Assign and change the flow direction

9、 of the medium.Ball valves are widely adopted in recent yearsA new type of valve has the following advantages:One.The fluid resistance is small, and the coefficient of drag is equal to the pipe length of the same length.Two.The utility model has the advantages of simple structure, small size and lig

10、ht weight.Three.Tight and reliable,At present, the ball valve sealing surface materials widely used plastics,Good tightness,It has also been widely used in vacuum systemsUse.Four.Convenient operation, open and close rapidly, from fully open to fully closed as long as the rotation90 degrees for long

11、distance control.Five.Easy maintenance, ball valve structure is simple, the sealing ring is generally movable, disassembly and replacement are more convenient.The document at billion season, good music with the mini iPad mobile hard disk Baidu Polaroid bag 6.When fully open or fully closed,The seali

12、ng surface of the ball and valve seat is separated from the medium,Medium passing,It will not cause the sealing surface of the valveErosion.Seven.Wide range of applications, from a few millimeters to a few millimeters, large to several meters,From high vacuum to high pressure can be applied.Ball val

13、ve has been widely used in petroleum, chemical, liquefied petroleum gas, water supply and drainage, food, pharmaceutical, power generation, paper making, urban construction and mineral resources,Boilers, steam systems, municipal, atomic, aviation, rocket and other sectors, as well as in peoples dail

14、y life.Globe valveMainly used to connect or block the pipeline medium, especially in areas requiring rapid opening and closing, such as emergency unloading and so on.Because of its advantages of simple structure, less parts, light weight and good sealing performance, it has been widely used. Structu

15、re: mainly byBody, bonnet, seal seat, ball and stem etc. The ball with holes is the core of the ball valve, and the ball is rotated by the valve stemTo control the opening and closing,Rotation is the whole switch.The ball valve can be divided into two major categories: floating ball valve and fixed

16、ball valve.Special features of floating ball valvesThe point is that the sphere is free to float.According to the structure of the sealing seat, the utility model is divided into two parts: a fixed seal seat and a movable sealing seat.fixedFloating ball valve with sealed valve seat,The structure is

17、shown,The valve body is provided with two fixed sealing seats made of fluorine plastic,In the two roomA floating ball made of carbon steel or stainless steel is clamped between the seats,The sphere has a circular through hole,After opening,Channel open;WhenWhen the stem rotates,The ball hole is perp

18、endicular to the valve passage,Press the ball tightly against the seat at the back, depending on the pressure of the medium,Guaranteed valveSeal.High pressure hard sealing ball valveThe main selection principlesOneThe oil and gas transmission line, the need to clean the pipeline, but also buried in

19、the ground, the use of full path, full weldingBall valve with connecting structure;Buried on the ground,Ball valves with all through diameter welded connections or flanged connections are selected;Branch pipe,Flange companyConnecting, welding and connecting all through or reducing ball valves.TwoPro

20、duct oil pipeline and storage equipment, choose flanged ball valve.ThreeOn the city gas and natural gas pipeline, choose the flange connection and the internal thread to connect the floating ball valve.Four,In the oxygen piping system of metallurgy system, the fixed ball ball valve should be selecte

21、d after strict degreasing treatment and flange connection.Five,Low temperature medium pipe system and device, should choose to use the valve cover of low temperature ball valve.Six,The lifting rod type ball valve can be used on the pipeline system of the catalytic cracking unit of an oil refining un

22、it.Seven,A caustic and corrosive medium in a chemical system and in a piping system,Austenitic stainless steel should be used to make,Poly fourFull stainless steel ball valve with vinyl fluoride as valve seat sealing ring.Eight,A piping system or device in a metallurgical system, power system, petro

23、chemical plant, or high temperature medium in a municipal heating systemMetal to metal sealing ball valve is adopted.Nine,When the flow control needs to be carried out, you can use the worm gear drive, pneumatic or electric beltVShaped opening regulating ball valve.High pressure hard sealing ball va

24、lveAdvantagesOne,With minimum flow resistance(Practically zero).Two,It wont stick at work(When there is no lubricant),Therefore, it can be used reliably in corrosive medium and low boiling liquid.Three,Complete seal can be achieved in larger pressure and temperature range.Four,Fast opening and closi

25、ng can be realized. The opening and closing time of some structures is onlyZero Point Zero Five0.1sTo ensure that the test bench can be automatedChemical system. Quick opening and closing valve, operation without shock.Five,The ball closure can be automatically positioned in position.Six,The working

26、 medium is sealed reliably on both sides.Seven,When fully open and fully closed,The sealing surface of the ball and valve seat is separated from the medium,Therefore, high speed through the valve medium will not causeErosion of sealing surface.Eight,Compact and lightweight, it can be considered the

27、most reasonable valve structure used in cryogenic media systems.Nine,The valve body is symmetrical, especially the welded valve body, and can well withstand the stress from the pipe.TenThe closure can withstand high voltage differential when closed.Eleven,Ball valve with full welded body,It can be b

28、uried directly in the ground,Keep the inside of the valve free of corrosion,Maximum service life up toThirtyYear,Its oil,The ideal valve for natural gas pipeline.As the ball valve has these advantages, so a wide range of applications, the ball valve can be applied to:One,Nominal diameter from8mmreac

29、h1200mm.Two,Nominal pressure from vacuum to42MPa.Three,Operating temperature from-204degree815Degree.Sealing advantagesBall valve is the main seat ring material is PTFE(PTFE)It is inert to almost all chemicalsThe,And the friction coefficient is small,Stable performance,Refractory,Comprehensive tempe

30、rature range and excellent sealing performancePoint. But the physical properties of PTFE include higher expansion coefficient, sensitivity to cold flow, and poor thermal conductivity,Requirements for seat seal design must be carried out around these characteristics. The seat sealing plastic material also includes filling ptfe,Nylon and many other materials.But,When the seal is hard,The reliability of the seal will be destroyed,Especially at low leve